And what a giant they slew! This 420921 digit number (formed by multiplying
two by itself 1398268 times, then subtracting one) is now the largest
known prime. It is also the 35th
known Mersenne prime, and so comes paired with the 35th known perfect
number. There are still infinitely
many more giants left to slay, so why not surf over to Woltman's
GIMPS site and join the search for the next record prime?